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Merge pull request #96 from kzys/new-codegen

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Add protoc-gen-go-ttrpc
This commit is contained in:
Phil Estes
2021-11-08 13:05:39 -08:00
committed by GitHub
parent d2d6bb6f89 6eabacc9bc
commit 0247db16a1
4 changed files with 168 additions and 2 deletions
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125
cmd/protoc-gen-go-ttrpc/generator.go Normal file
View File

@@ -0,0 +1,125 @@
/*
Copyright The containerd Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package main
import (
"strings"
"google.golang.org/protobuf/compiler/protogen"
)
// generator is a Go code generator that uses ttrpc.Server and ttrpc.Client.
// Unlike the original gogo version, this doesn't generate serializers for message types and
// let protoc-gen-go handle them.
type generator struct {
out *protogen.GeneratedFile
ident struct {
context string
server string
client string
method string
}
}
func newGenerator(out *protogen.GeneratedFile) *generator {
gen := generator{out: out}
gen.ident.context = out.QualifiedGoIdent(protogen.GoIdent{
GoImportPath: "context",
GoName: "Context",
})
gen.ident.server = out.QualifiedGoIdent(protogen.GoIdent{
GoImportPath: "github.com/containerd/ttrpc",
GoName: "Server",
})
gen.ident.client = out.QualifiedGoIdent(protogen.GoIdent{
GoImportPath: "github.com/containerd/ttrpc",
GoName: "Client",
})
gen.ident.method = out.QualifiedGoIdent(protogen.GoIdent{
GoImportPath: "github.com/containerd/ttrpc",
GoName: "Method",
})
return &gen
}
func generate(plugin *protogen.Plugin, input *protogen.File) error {
file := plugin.NewGeneratedFile(input.GeneratedFilenamePrefix+"_ttrpc.pb.go", input.GoImportPath)
file.P("// Code generated by protoc-gen-go-ttrpc. DO NOT EDIT.")
file.P("// source: ", input.Desc.Path())
file.P("package ", input.GoPackageName)
gen := newGenerator(file)
for _, service := range input.Services {
gen.genService(service)
}
return nil
}
func (gen *generator) genService(service *protogen.Service) {
fullName := service.Desc.FullName()
p := gen.out
serviceName := service.GoName + "Service"
p.P("type ", serviceName, " interface{")
for _, method := range service.Methods {
p.P(method.GoName,
"(ctx ", gen.ident.context, ",",
"req *", method.Input.GoIdent, ")",
"(*", method.Output.GoIdent, ", error)")
}
p.P("}")
// registration method
p.P("func Register", serviceName, "(srv *", gen.ident.server, ", svc ", serviceName, "){")
p.P(`srv.Register("`, fullName, `", map[string]`, gen.ident.method, "{")
for _, method := range service.Methods {
p.P(`"`, method.GoName, `": func(ctx `, gen.ident.context, ", unmarshal func(interface{}) error)(interface{}, error){")
p.P("var req ", method.Input.GoIdent)
p.P("if err := unmarshal(&req); err != nil {")
p.P("return nil, err")
p.P("}")
p.P("return svc.", method.GoName, "(ctx, &req)")
p.P("},")
}
p.P("})")
p.P("}")
clientType := service.GoName + "Client"
clientStructType := strings.ToLower(clientType[:1]) + clientType[1:]
p.P("type ", clientStructType, " struct{")
p.P("client *", gen.ident.client)
p.P("}")
p.P("func New", clientType, "(client *", gen.ident.client, ")", serviceName, "{")
p.P("return &", clientStructType, "{")
p.P("client:client,")
p.P("}")
p.P("}")
for _, method := range service.Methods {
p.P("func (c *", clientStructType, ")", method.GoName, "(",
"ctx ", gen.ident.context, ",",
"req *", method.Input.GoIdent, ")",
"(*", method.Output.GoIdent, ", error){")
p.P("var resp ", method.Output.GoIdent)
p.P(`if err := c.client.Call(ctx, "`, fullName, `", "`, method.Desc.Name(), `", req, &resp); err != nil {`)
p.P("return nil, err")
p.P("}")
p.P("return &resp, nil")
p.P("}")
}
}

35
cmd/protoc-gen-go-ttrpc/main.go Normal file
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@@ -0,0 +1,35 @@
/*
Copyright The containerd Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package main
import (
"google.golang.org/protobuf/compiler/protogen"
)
func main() {
protogen.Options{}.Run(func(gen *protogen.Plugin) error {
for _, f := range gen.Files {
if !f.Generate {
continue
}
if err := generate(gen, f); err != nil {
return err
}
}
return nil
})
}

1
go.mod
View File

@@ -9,4 +9,5 @@ require (
golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c
google.golang.org/genproto v0.0.0-20200224152610-e50cd9704f63
google.golang.org/grpc v1.27.1
google.golang.org/protobuf v1.27.1
)

9
go.sum
View File

@@ -13,11 +13,13 @@ github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfU
github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
github.com/golang/protobuf v1.3.3 h1:gyjaxf+svBWX08ZjK86iN9geUJF0H6gp2IRKX6Nf6/I=
github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
github.com/golang/protobuf v1.5.0 h1:LUVKkCeviFUMKqHa4tXIIij/lbhnMbP7Fn5wKdKkRh4=
github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
github.com/google/go-cmp v0.5.4 h1:L8R9j+yAqZuZjsqh/z+F1NCffTKKLShY6zXTItVIZ8M=
github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
@@ -90,5 +92,8 @@ google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyac
google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
google.golang.org/grpc v1.27.1 h1:zvIju4sqAGvwKspUQOhwnpcqSbzi7/H6QomNNjTL4sk=
google.golang.org/grpc v1.27.1/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=